Punching die



July 15, 1924. 1,501,241

E. c. RUDKIN PUNCHING DIE Filed Aug. 4, 1922 Patented July-15, 1924.

UNI-TED STATES PATENT OFFICE.

EDWIN C. RUDKIN, OF BROCKTON, MASSACHUSETTS, ASSIGNOR TO NORMAN L. BROOK, OF WEST BRIDGE'WATER, MASSACHUSETTS, JOSEPH C. KNIGHT, OF BROCKT'ON, -MASSACHUSETTS, AND EDMOND A. HEBERT, F HOIBROOK, MASSACHUSETTS.

PUNCHING DIE.

Application filed August 4, 1922, Serial No. 579,664.

To all whom it may concern:

Be it known that I, EDWIN C. RUDKIN, a citizen of the United States, residing at Brockton, in the county of Plymouth and State of Massachusetts, have invented new and useful Improvements in Punching Dies,

- of which the following is a specificatlon.

This invention relates to a punching die, constituting an element of a machine for \0 ornamenting blanks forming parts of shoe uppers, etc., by cutting small holes therein, arranged in a series extending along edge portions of the blanks, the die including a die plate bearing on a bedplate or holder, adapted to be horizontally supported on the bed of the machine, the die plate being provided with an elongated row or series of upstanding punches, formed and arranged to ornament an edge portion of a blank deposited on a yielding apertured stripper plate normally supported slightly above the cutting edges of the punches, the blank being pressed against the punches by a reciprocating presser or platen, which depresses the stripper plate and causes the punches to cut holes in the blank.

It is often desirable to additionally ornament the central portion of the blank, by forming holes in its central portion, within the row or series of holes formed by the elongated row of punches.

One object of the invention is to enable the plate of a punching die, which may be called a primary die, carrying a row of blank edge-ornamenting punches, to locate the plate of a supplemental punching die with its punches in position to ornament the central portion of the blank within the row of holes formed by the punches of the primary die, the latter being adapted to be used independently when additional ornamentation is not desired.

Another object is to provide a bed plate or holder, adapted to simultaneously support a primary and a secondary punching die, and to permit either the conjoint use of said dies, or the'use of the primary die alone.

Another object is to provide means for supporting a primary and a secondary punching die in fixed adjustable'relation to each other, so that the distance between the punches of the two dies may be varied. I

attain these and other objects by the improved construction hereinafter described and claimed.

Of the accompanyin drawings forming a part of this specificat1on,'

Figure 1 is a perspective view of a primary d1e, constructed in accordance with the invention, a portion of the stripper plate being removed; I

Fig. 2 is a perspective view of a secondary die, adapted to cooperate with the primary die, the stripper plate of the secondary die being removed;

Figs. 3 and 4, show in perspective the parts or sections of a sectional bed plate or holder, adapted to support the primary and secondary dies, and hold said dies operatively related to each other;

Fig. 5 is a top plan View of a punching machine element which includes the punching dies and the sectional holder shown by the preceding figures, portions of the stripper plates of the punching dies being broken away;

Fig. 6 is a section on line 6-6 of Fig. 5; Fig. 7 is a section on line 77 of Fig. 5; and

Fig. 8 is a perspective view, showing a modified form of the bed plate or holder.

The same reference characters indicate the same parts in all of the figures.

The drawings show the preferred embodiment of the invention, but I wish it understood that various changes and modifications may be made, within the scope of the appended claims.

The primary die, shown separately by Figure 1, comprises a plate 12, which may be composed of rigidly connected layers, and has a continuous forward edge portion, provided with the usual upstanding tubular punches 13, which may be of any desired form, and may have any desired arrangement, whereby an elongated row or series is formed. In this instance, some of the punches are larger than the others. The plate 12 is provided with a throat extendin forward from its rear edge and preferably of the form shown by igure 1, the throat having parallel side faces 14, and its closed end being formed by angular faces 15, forming a re-entrant-angle, the apex of not Ti punches 13.

which'i i s in close proximity to the central The stripper plate 16 of the primary die is attached at its rear edge, as by screws 17, to the rear edge portion of the plate 12, its free edge portion being provided with the usual punch-receiving holes 18, and yieldingly supported as usual, so that the upper surface of its free edge portion is substantially flush with the upper ends of the punches. The stripper plate has a throat coinciding with the throat of the plate 12, and having side faces 19, and angular end faces 20.

The secondary die shown separately by Figure2, comprises a plate 21, which may also be composed of rigidl connected layers, and has parallel ed e aces 22, and an gular end faces 23, con orming to the. faces of the throat in the plate 12. The plate 21 is provided at its angular end portion with a group of upstanding tubular punches 24, having any desired form and arrangement. The insertion of the plate of the secondary die in the throat of the primary die locates the secondary die punches 24, in position to cooperate with the primary die punches 13, in ornamenting a blank 25, indicated by dotted lines in Figure 5, the punches 24 forming holes in the central portion of the blank within the row of holes formed by the punches 13. The secondary die plate is provided with a yieldingstripper late 26, conforming to the outline of said ie plate, the

blank 25 being supported by the two stripper plates before the punching operation.

It is customary to superimpose the punchcarrying plate of the punching die of a blank-ornamenting machine, on a bed-plate or holder, adapted to rest loosely on a fixed part of the machine, said bed-plate having channels coincidingwith the punches, and receiving and conducting away the cuttings detached from blanks by the unches, means being provided for detacha ly connecting the die-plate with the bedl-plate, with the bores of the punches registering with the channels in the bed-plate. In accordance with my invention, I provide a bed-plate adapted to detachably engage and support both the primary die and the secondary die, and permit the primary die to be used either alone, or with the secondary die. I

Said bed-plate is preferably of'sectional construction, as shown by Figures 3 and 4, and includes a primary section 28, the area of which is-similar to that of the primary die-plate 12, and a secondary section 29, the area of which is similar to that of the secondary die-plate. has a throat with parallel side faces 30, angular end faces 31, and channels 32 arranged to coincide with the punches 13. The secondary section 29 has parallel side faces 33, angular end faces 34, and channels 35 The primary section 28' by Figure 7. The die-plates may be positively secured. to the holder sections, after the insertion of the pins in the sockets, by screws 38. The secondary holder section 29 may be engaged with the primary section 28,

by any suitable confining means adapted to prevent accidental movement or displacement of the secondary section, said means as here shown, being adapted also to adjust the secondary section, and hold the same and the secondary punching die engaged therewith, with the punches 24 at different distances from the punches 13. To these ends the secondary section 29 is provided with an ear. 40, having a slot 41, engaging the peripherally grooved head 42 of a screw 43 which engages a tapped orifice 44 (Figure 3) in the primary section 28. Rotation of said screw causes it to move endwise, and move the secondary section endwise in the throat of the primary section. The plate 21 of the secondary die, and the throat of the primary die are preferably wider than the secondary holder section 29, and the throat of the primary section, so that the longitudinal edges of the plate 21 overlap portions of the upper surface of the primar holder section, as shown by Figure 7. I desired, the faces 30 of the throat of the primary section 28, may begrooved to receive tongues on the faces 33 of the secondary section 29.

he construction of the bed plate or holder may be modified, as shown by Figure 8, which shows a holder 46 without a throat, and forming a continuous supportfor the primary and secondary punching dies, said holder having sockets 37, to receive the steady pins on the primary die-plate, and sockets 37", to receive the steady pins on the secondary die-plate. The holder thus formed may have the channels 32 coinciding with the punches 13. The channels 35 coinciding with the punches 24 may be formed in a block 47, removably inserted in an opening 48 formed in the holder 46. Another block having a different arrangement of channels corresponding with a dif-- ferent arrangement of punches 35, may be substituted for the block 47.

It will now be seen that I have provided a punching machine element, which is adapted for use in ordinary. punching machines for forming either one row or group of holes at a time, or two groups simultaneously, and that each of the primary and secondary punching dies forming component arts of said element, may be used with ot er dies having different arrangements of punches.

It will be seen that I have provided a punching machine elementwhich includes a plurality of punching dies, adapted to be used either singly or simultaneously, each die having any suitable arrangement or grouping of punches, and a holder for said dies, adapted to support the dies either separately, for independent use, or simultaneously, for conjoint use, the holder having outlets for cuttings formed by the die punches, an the dies and holder being provided with means whereby the dies may be detachably secured to the holder in oper ative relation to each other.

I- am, therefore, enabled to employ any number of dies interchangeably, and to provide for eachdie a holder which is intenchangeable with other holders, it being understood that each holder will have outlets for the cuttings, arran ed in conformity to a given arrangement 0 the die punches, so

that, in changing from one arrangement of punches to a different arrangement, a holder having a corresponding arrangement of outlets will be employed. Any number of interchangeable dies and interchangeable holders fitting the dies, may, therefore, be provided for use in an ordinary punchingmachine.

I claim:

1. A punching-machine element compr sing a prlmary punching die including a dieplate and a group of tubular punches thereon in fixed relation to each other and to the plate and arranged to ornament an edge portion of a blank, the plate of the primary die being provided With means for locating the plate of a secondary punching die with its punches in position to ornament another portion of the blank.

2. A punching-machine element comprising a primary punching die including a die-plate, and a group of tubular punches thereon in fixed relation to each other and to the plate and arranged to ornament an edge portion of a blank, said plate having a throat; and a secondary punching'die including a plate insertible in said throat, and a group of tubular punches thereon in fixed relation to each other and to the plate, the throat being arranged to locate the plate of the secondary die in position to ornament another portion of the blank.

3. A punching-machine element comprising a primary punching-die including a dieplate, and a group of tubular punches thereon in fixed relation vto each other and to the plate, and arranged to ornament an edge portion of a blank, said plate having a throat; and a secondary punching-die ineluding a plate insertible in said throat, and a group of tubular punches thereon in fixed provided for holding said dies in a fixed relation to each other. 4. A unching-machine element comprismg a primary punching die includin a dieplate, and punches thereon, arrange to ornament an edge portion of a blank, said plate having a throat; and a secondary die including a plate insertible in said throat, and punches thereon, the throat being arranged toloeate the plate of the secondary die in ppsitlon to ornament another ortion of the lank, means being provided or adustably holding said dies in a fixed relation to each other. 5. A punching-machine element comprismg a primary punchin die including a dieplate, and punches t ereon, arranged to ornament an edge portion of a blank, said plate having a throat; a secondar' die including a plate insertible in sai throat, and punches thereon, the throat being arranged to locate the plate of the secondary d1e 1n position to ornament another portion oi the blank, and a holder on which said die plates are separately mounted and mainta ned 1n operative relation to each other, said holder and plates having separable mterengaging means.

6. A perforating-machine element substantially as specified by claim 5, said holder being'provided with means for adjusting the secondary die to ya the distance of its punches from those 0 the primary die. 7 A punching-machine element comprising a prlmary punchin die including a dieplate, and punches thereon, arranged .toornament an edge portion of a blank, said plate having a throat; a secondary die including a plate insertible in said throat, and punches thereon, the throat being arranged to locate the plate of the secondary die in position to ornament another port-ion of the blank, and a sectional holder composed of a primary section conforming to the primary die-plate, and provided with a throat, and a secondary section conforming to the secondary die-plate, and insertible in the throat of the primary section, the die plates and holder being provided with separable interengaging means.

8. A perforating-machine element substantially as specified by claim 7, the said secondary section being adjustable in the throat of the primary section, means being provided for confining the secondary section in any position to which it may be adjusted.

9. A punching-machine element comprising a primary punching die, including a dieplate having a throat closed at one end, punches arranged in a row extending beside the closed end of the throat, and a yielding last-named punches, the die-plate and strip stripper plate, adapted to cooperate with per plate of'the secondary die being formed 10 said punches, and havin a. throat registerto enter the throats of the primary die and ing with the throat of t e die-plate; and 21 its stripper plate. L secondary unehing die, including a die- In testimony whereoflhave affixed my sigplate, punc es arranged in a group at one nature. end portion of said plate, and a yielding stripper plate adapted to cooperate-with the EDWIN C. RUDKIN. 

